Spiranthes lacera

Spiranthes lacera, commonly called the slender ladies'-tresses, is a species of orchid that is native to Eastern North America. It has a widespread range and is found in a variety of open habitats, both natural and disturbed. It produces a spiral of white flowers in the summer.

Slender ladies'-tresses
Spiranthes lacera var. gracilis.jpg
S. lacera var. gracilis
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Cranichideae
Genus: Spiranthes
S. lacera
Binomial name
Spiranthes lacera
Spiranthes lacera distribution.svg

There are two varieties recognized:[1][2]

  • S. lacera var. gracilis - Southern slender ladies' tresses, flowers more densely arranged in spiral, blooming later (late-July through August). Plant hairless and leaves usually absent at flowering.
  • S. lacera var. lacera - Northern slender ladies' tresses, flowers more loosely arranged in spiral, blooming earlier (mid-July). Plant hairy and leaves usually present at flowering.


  1. ^ http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242101954 Spiranthes lacera in Flora of North America
  2. ^ Bentley, Stanley (2000). Native Orchids of the Southern Appalachian Mountains. Chapel Hill, NC: University of North Carolina Press. pp. 201–203. ISBN 0-8078-4872-7.